Double-drum hoist



" Jan. 24, 1928. 1,657,165

E.B. LEAR DOUBLE DRUM HOIST Filed July 15, 1926 y Af ' 1 2 v I INVENTOR.eer

Paienfed Jan. 24, 192s.

l UNITED STATES "PATENTKoF FICE.

EARL .'B. LEAR, OF PHILLIPSB'URG, NEW JERSEY, ASSIGNOR TOINGERSOLL-RA'ND COM-l i PANY, OF JERSEY CITY, NEW JERSEY, A CGRPORATIONOF NEW JERSEY.

DOUBLE-DRUM HoIsT.

`application met July 15,

This invention `relates to double drum hoists of the type in ywhich onedrum or the other is automatically "connected to be driven from areversible motor in accordance with the direction of rotation of themotor.

The object ofl the present invention 'is to enable `a double endedrocking pawl or clutch member to be finounted on a main driver locatedat one end of one of the drums so that the pawl may rock through a planeoffset from and paralleling theaxis of ro'- tation of the drive shaft.Otherobjects will appear hereinafter. yThe invention is illustrated inone of its preferred forms in the accompanying draw- 1ngs,inwhich Figurel isa sectional elevation of a holst, Figure 2 is a transverse sectionalelevation taken 'through Figure 1 'i on the line 2.0 2 2 looking in thedirection of thearrows, and i Figure 31s a plan view` partly ,in sectiontaken through Figure 2 `on the line 3``3 looking in the direction of thearrows.

Referring to the drawings, A` designates a base plate of the hoist onthe opposite ends of which are/mounted end frames B and C. The end frameC in this instance also serves as a housing for a motor D of thefflatpiston type, sometimes called the ",Dake motor.

The invention, however, is not confined to Y 0 extends coaxlallythroughthe center" bearthe particular'type of'motor illustrated and anysuitable reversible motor may be sub-y stitued therefor. In thisVinstance a valve chest E secured to the end frame C by means ofsuitable bolts F serves as avclosure for one side of the motor D.

Pressure fluid for'actuating the' motoi-D is conveyed to the valve chestE through a connection G and the distribution or admission of suchpressure fluid to the motor may be controlled by any suitable valve`(not shown), intended to be actuatedby-a reversing lever I-I.v Theframes B and 'C in other and in addition a substantial Abearin isprovided by the center bearingfor a hau age drum P and a tail rope drumQmounted side by side. An extenslonR is formed on of any well known`type which` interlock "with similar clutch teeth T carried by a thisinstance are braced at their upper ends by a tie rod J which extendsthrough ythe 192e. serial No. 122,676.`

and are screwed into the ,plate O.` By thus securing the center bearingL in the manner described, the -frames `B and C are rigidly supportedand braced with respect to each the haulage drum P and has clutch teethS sleeve 'U of a toothed drum driver `V` for `transmitting rotarymovement of the said drunidriver to the drum l?. Y The sleeve -U of the'drum driver V is in this instance of l70 the same external diameter asthe extension R wherewith it cooperates to form 'a full bearing for thetail rope drum Q.

Suitableimeans are provided for checking Y or retarding rotation of thedrums whenever one drum or the other `of the drums is disconnectedfromthe driving element. `To `r this end the drum Q, is provided with anannular lateral flange W and the drum .P`

has a flange Y on which arel mounted brake bandsfZand b. The brake bandsZ and b are referablyof the type which encircle the anges W` and Y andmaybe manipulated in any suitable and well known man ner. f

y y In the present instance a main drive shaft ing L and is connected atone end to the the drive shaft c is supported in the end of l the centerbearing by an anti-friction bear?` y ing e. A similarr anti-frictionbearing is also provided forthe drive shaft c forthe` end of said driveshaft adjacent the motor. To the outer end of the drive shaft o is keyed.a driving pinion f which is rotatable in a gear box g in the frame Band meshes withan intermediate gear la. mounted on a n shaft The shafty' in this instance is provided atits endsy with anti-friction bearingsis ando supported by the frame'B and carries at its inner end a pinion pwhich meshes with `an internal gear g of a main driver o'.

In accordance with the present invention a bearing s is formed on themain driver 0?105 y 'pawls instancebeing .adapted to rotatecin the sainetransverse plane."` "On the oplosite sidesof the bearing .s are arrangedpawl members u and o." These members" are preferably ot' symmetric al`torination and `are arranged to" extend inoppcsite `directions sothat-"- Athe i paWl is in ei'ect a double ended pawl.` `lllese pawls arepreferably held in assei'ribled`po-` sition and pivoted onthebea-iing;as byiafbolt w which extends therethrough and is provideduwith d a suitable.mnt-mm1whereby the d e and tver@ @lampedinniesition.Alhe i, bolt `fw =is preferably disposed radially with respect totheclongitndinal axis oit the `main driver r, so `:that i the paivls fiaand y a; will oscillate in `planes- `parallel with trespect to d Thisadds `to the expense of maintenance of thelhoist and at times greatlyinterferes with the service for the reason that such parts are not atall times readily available. By form- :ing the pawlmembersseparately the`present instance, fthese Allmembers may in terchangedone for the otherm case one of the paivls show signs ot greater wear than the other, `oravneimpawl may be substituted for the worn paivl.

I.clai1n: l t Lln alhoist, the combination of end` trames, a centerlthearing *sngportedby the end trames,ca drive shatextending through ithe center bearinga i reversible lmotor for rotating the `drive rshaldepair of drums each Vother :and with; respect tothe iaxisiojf rrotatable`relatimel-l1v tothe drivershaft, conl rotation ofthe niainlriver. i L

In order'to irrevntirelatve armement betweenthetpasvlsm/and rv andthebolt/mikey i slotsfy are formed inithe pawls tobooperate With'lreyse`seatedin the bolt w. The bolt of w in l this instance extends radiallyfrom .the i drive shaft 'a and iinfthis @may the 1lgaWl-swia and v .arecaused to'l oscillate in i aplane offset from and paralleling, the laident-rotation ofwthe drive shaft.` f 1 i z In the operation otvthehoist, detiitfbe assumed,j` that it` be, `desired ,to "conneatthehaulage drinn P to be Hrotatedibygtheinaindriver R; fllheleverfHCi andconsequently it the throttle ,val-ve may then tbe moved to Aa positionfor actuating the i motoria; the requiredI direetionrin thisilistancesini a clock: Wisedirectionas Figurebl lis viewed jfrom Vthe right, Themaindriver r Wllthendneq togthe train Aof gearingywhich-eonnects it withthedriving shaft @.fbe caused to rotate in a counter-elocltwisedirectionthns causing .the patvl o to engage one of the teeth of the fdrnmfdriver VY and thedrinnfrltwill remain interloclred with;` theanainwdritcer `until `xthe motorlis again reversed. Upon reversal olii;the i throttle ilever "H and t consequently the u motor t `the kniaindriver Will; ,be eansed to lrotate in the l; opposite `directiontoirotate the drum Q- The: rerrsel the Beatle driver will cause the'pawlo-to beaforcedout 1 of .engagement from the drinn, dri-verV and thepawlfuf Will he simultaneonslyicom nected With ,thedrum driverz'carriedbythe" tail {ropedrnin i C In hoists otthis type,` infrequently hap`pens,` thaty (meot the pavvl members issnb-i o jectedto `greater mearthan the'otliervpawl member, sothatiat times, :depend-ing npon i their@0f WW1 asedii beco1nels`aeeessary; to discard the entire `p avvl ialthonghflonepor'- L tion "thereof )night be "capable of renderingservice "tor a considerably greater length of t-irne.` Owing Atothedact,` fhovverehdhat there has ndprovisionbeen made to :permit i suchpawls to *be `reversed in theNhistft-he entire Apavvl assembly will dhave -tofbe dis-` carded and a neivpavvl substitntel'therefor;-

i centrically arranged .i drum drivers-associated 1 i i with the drains,i said idx-'nm `drxvers rotating in the :same transverse plane,` a,`ymain driven B5 i rotatable ion the center bearing canneeted@ to berotated by the drinteaha'ft,andraldouble` ended 1pawl carried Yby `T`the`main Adriver l to i engage one or :the i other uofthe-drain inaccordance avith the `direction of rotation 90 i of the said maindriver, said pawtoseillating i about .an axis radial to of the drive ishaft.

i2. ln, 1a hoist, the 'coinbination `.oflenlcl `.the axis not' rotationframes,a `reenter ,bearing supported the "l end frames,` a drive shaftextending' through ,the centerbearhigng, .aureversible `:motor yforrotatin thelrlve shaft, aj airotdrnrns rotatab e relatively :to .the.drive Lshaft, con-i `centricallyjarranged `drum drivers. associatedwith the drninsVsaiddruln drivers `.beingfloi catedat one endotithedrumsandadapted i to "lrotate inthe .same transverse plane," a maindriver rotatable `on Mone end ot the .cen-i ter bearing .connected toberotated hy the" `:m6 drive shaft, a doribleiended" paal i carried by the`main .drivergto "engage .one `1101' .the` other of the .drumdriversiin` acnordance 1with thefdirection of rotation of themainldriver said 4panal oscillatn )about an artis radial .i110` to theaxis `oi? rotation of `theldrive shaft,

In a uhoist, the geombination of lend; i frames, a centerbearingsnpported by the end frames,` a drive. shaft, i a irreversible.motor j t'orrrotatingthedriveallait, `a-pair ofvdrlims 11 15 rotatableVrelatively` @to .the drive shaft, conf centrcally. arrangeddrumilrivers associated with the `drinne and rotating" in .the ,sametransverse plane, said .drum drivers located atoneuendyof one otthedrunisfapml main driver rotatable `on lone and of the center bearingconnectedfto @be rotatedby the drive shaft, a .bearingointegral maindriver, Lpawls on .ogpositesidesxoft the bearing and extending `inopposite directions 125` h to engage one or the other `oi?theilrill'rr`drivers in accordance ywith ithe directiono` rotation of the maindriver? aholt extending through the `parvis4 and the bearing to' nform`alpivot forfthepaw'ls` `said bolt 4being dis-` 11:130"

y posed radially with respect to the main bearing and disposed radiallywith respect to the main driver, pawls secured to the bolt on oppositesides of the bearing and extending in opposite directions to engage oneor the other of the drum drivers in accordance with the direction ofrotation of the main driver, the paWls oscillating in planes parallelWith respect to each other and with respect to the axis of rotation ofthe main driver.`

In testimony whereof I have signed this specification. t

EARL B. LEAR.

